Carbon and Nitrogen Notes

Carbon & Nitrogen Cycles

Multiple Choice

What level of organization is this?

• Organism

• Population

• Community

• Ecosystem

Multiple Choice

Which is an example of a biotic factor?

• A river.

• A cloud.

• A rock.

• A tree.

Open Ended

In your own words tell me what a symbiotic relationship is

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Multiple Choice

Carbon forms the backbone of which macromolecule(s)?

• Proteins

• Nucleic Acids

• All of them

• Lipids

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Multiple Choice

Which two macromolecules contain nitrogen?

• Proteins, Nucleic Acids
• Vitamins, Minerals
• Fats, Sugars
• Carbohydrates, Lipids

Multiple Choice

What is nitrogen fixation?

• Nitrogen fixation is the absorption of nitrogen by plant roots.
• Nitrogen fixation is the breakdown of ammonia into nitrogen gas.
• Nitrogen fixation is the process of burning nitrogen in air.
• Nitrogen fixation is the conversion of nitrogen gas into a form usable by plants.

Multiple Choice

What do denitrifying bacteria do?

• They convert nitrogen gas to nitrates.
• They produce ammonia from nitrates.
• They convert nitrogen back into a gas.

• They absorb nitrogen from the atmosphere.